WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
The 7 pin tubes are from the second generation of AA5 radios. The octal tubes are from the first gen. The octal version of the 35W4 is the 35Z5. The circuit should work as is although some experimentation may be needed to get the sound exactly right. The capacitor across the output transformer was fairly common in old AM radios since it helped dull the static. In a guitar amp the sound may be improved with a lower value or no cap at all.